Pure Boxer (2023)

Both involve boxing, focus on training, and cool fights. Both are feel good series. Go check the description

Both have the theme of fixing sports games... in MLB they mention baseball and the main sport is Boxing.
Both have slight and slow burn romance. (Although it's too soon to say about LFiS).
Both have murders and corruption.
The sports part seems more serius in this one (LFiS) = And I personally find it more rich in storytelling, characters and cinematography...

10 years ago in the town of An Yang, the origin of Yuan Wu Dao martial arts, world champion Qu Xiang Nan was accused of doping and his prestigious title was stripped. He became a disgrace to the town and tarnished their name in the arts of Yuan Wu Dao. The story of Tornado Girl is set in the present and revolves around his adopted daughter and student Qi Bai Cao in her journey of becoming a true Yuan Wu Dao martial artist, fighting her way to the top and reclaiming her Teacher's innocence. Along the way she encounters friends such as her stoic and selfless Yuan Wu Dao senior Ruo Bai, the warm and caring but mysteriously secluded medic Yu Chu Yuan, and the flirtatious, playful Fang Ting Hao with a hidden agenda. Together they learn, grow, compete, find love and fight for their dreams.

Both dramas are related to sports, and a sort of rehabilitation, and sparking the passion for sports

Both dramas focus on athletes trying to overcome their limits and figure their relationship with sport.